Teaching on a roll

Sometimes I come into class and I have my materials set before me and my lecture notes and texts marked with post-its. My seating chart is ready, my first page of notes is underlined properly, drawing attention to the important points that need to be emphasized before the day is done. And then a student offers an interesting (and provocative) observation and the notes suddenly seem redundant, unimportant, because the burning issue has just been framed in exactly the way you want it to be framed and the discussion takes off. And it is a worthwhile discussion because there are strong arguments to be made on both sides and suddenly I hear students making them. And they continue to make them after class.

Today was such a day.